X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from willowsprings.uwyo.edu ([129.72.10.31] verified) by logan.com (CommuniGate Pro SMTP 5.4.4) with ESMTPS id 5475475 for flyrotary@lancaironline.net; Tue, 10 Apr 2012 10:39:03 -0400 Received-SPF: none receiver=logan.com; client-ip=129.72.10.31; envelope-from=SBoese@uwyo.edu Received: from ponyexpress-ht3.uwyo.edu (extlb.uwyo.edu [172.26.4.4]) by willowsprings.uwyo.edu (8.14.4/8.14.4) with ESMTP id q3AEcOHd020750 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL) for ; Tue, 10 Apr 2012 08:38:25 -0600 (MDT) (envelope-from SBoese@uwyo.edu) Received: from ponyexpress-m10.uwyo.edu ([fe80::60dd:cb9e:6f71:3d48]) by ponyexpress-ht3.uwyo.edu ([fe80::4cde:db24:a0a9:ba5%15]) with mapi id 14.01.0339.001; Tue, 10 Apr 2012 08:38:24 -0600 From: "Steven W. Boese" To: Rotary motors in aircraft Subject: RE: [FlyRotary] Re: OMP Thread-Topic: [FlyRotary] Re: OMP Thread-Index: AQHNFxnETtb2fDr2bkqSOAML4VDCLJaUHEy0 Date: Tue, 10 Apr 2012 14:38:23 +0000 Message-ID: <3E8191F276108F4481AB0721BBA9269E05C38A20@ponyexpress-m10.uwyo.edu> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [75.220.33.168] Content-Type: multipart/alternative; boundary="_000_3E8191F276108F4481AB0721BBA9269E05C38A20ponyexpressm10u_" MIME-Version: 1.0 --_000_3E8191F276108F4481AB0721BBA9269E05C38A20ponyexpressm10u_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable John, Plumbing-wise, that would work. The possible problem is whether the flow r= ate of oil would be sufficient. With a normal linkage between the throttle= body and OMP, each of the three rotors would be receiving about half the a= mount of oil that was supplied to each rotor in the two rotor engine. Chan= ging the linkage between the throttle body and the OMP could compensate for= this for low power settings, but the oil flow rate at half to full throttl= e would still be limited to much less than stock. Steve ________________________________ From: Rotary motors in aircraft [flyrotary@lancaironline.net] on behalf of = downing.j@sbcglobal.net [downing.j@sbcglobal.net] Sent: Tuesday, April 10, 2012 6:59 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: OMP Steve, why not run one port to each rotor and return the 4th to the reservo= ir tank. JohnD ----- Original Message ----- From: Steven W. Boese To: Rotary motors in aircraft Sent: Monday, April 09, 2012 9:49 PM Subject: [FlyRotary] OMP Mark and all, The information that I previously gave on the '86 OMP delivery is in error.= After further analysis of the disassembled OMP, I realized that the deliv= ery rate for the front two ports depends on the DIFFERENCE between the diam= eters of the two sections of the pump piston. The result is that all four = of the ports deliver the same flow rate. This would make the application o= f this OMP to a three rotor engine more difficult, in my opinion. Of cours= e I could be wrong about that, too. I apologize for the mistake. Steve --_000_3E8191F276108F4481AB0721BBA9269E05C38A20ponyexpressm10u_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

John,

 

Plumbing-wise, that would work.  The possible problem is whether th= e flow rate of oil would be sufficient.  With a normal linkage between= the throttle body and OMP, each of the three rotors would be receiving abo= ut half the amount of oil that was supplied to each rotor in the two rotor engine.  Changing the linkage between = the throttle body and the OMP could compensate for this for low power setti= ngs, but the oil flow rate at half to full throttle would still be limited = to much less than stock.

 

Steve

From: Rotary motors in aircraft [flyrotary= @lancaironline.net] on behalf of downing.j@sbcglobal.net [downing.j@sbcglob= al.net]
Sent: Tuesday, April 10, 2012 6:59 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: OMP

Steve, why not run one port to each ro= tor and return the 4th to the reservoir tank.  JohnD
----- Original Message -----
Sent: Monday, April 09, 2012 9:49 PM=
Subject: [FlyRotary] OMP

Mark and all,

 

The information that I previously gave on the '86 OMP delivery is in err= or.  After further analysis of the disassembled OMP, I realized t= hat the delivery rate for the front two ports depends on the DIFFERENCE bet= ween the diameters of the two sections of the pump piston.  The result is that all four of the ports deliver th= e same flow rate.  This would make the application of this OMP to= a three rotor engine more difficult, in my opinion.  Of course I coul= d be wrong about that, too.

 

I apologize for the mistake.

 

Steve

--_000_3E8191F276108F4481AB0721BBA9269E05C38A20ponyexpressm10u_--